public static void DropConstraint(this IAlterProcessor proc, ConstraintInfo cnt)
{
var pk = cnt as PrimaryKeyInfo;
if (pk != null)
{
proc.DropPrimaryKey(pk);
}
var fk = cnt as ForeignKeyInfo;
if (fk != null)
{
proc.DropForeignKey(fk);
}
var uq = cnt as UniqueInfo;
if (uq != null)
{
proc.DropUnique(uq);
}
var ix = cnt as IndexInfo;
if (ix != null)
{
proc.DropIndex(ix);
}
var ch = cnt as CheckInfo;
if (ch != null)
{
proc.DropCheck(ch);
}
}